Excavating and loading machine.



G. W. JACKSON.

' EXGAVATING AND LOADING MACHINE.

APPLIGATION FILED MAR. 27, 1911.

Patented 1360.211912.

7 SHEETS-SHEET l.

6. W. JACKSON. EXGAVATING AND LOADING MACHINE. APPLICATION FILED MAR. 27,V 1911.

awww? 7 SHEETS-SHEET 2.

INVENTOR QMM'WW @y Patented Deo. s, `1912.

G. W. JACKSON. EXGAYATING AND LOADING MACHINE.

PPLIGATION FILED MAR.27` 1911. I

Patented Dec. s,l 1912.

7 SHEETS-SHEET 3.

WIWI@ iNVENTGH G. W. JACKSON. EXGAVATING AND LADING MACHINE.

APPLIOATION FVILBD MMM?. 1911.

(fv/y@ Patented Deo. 3, 1912.

G. W. JACKSON.. EXGAVATING AND LOADING MACHINE.

APPLIOATION rILBD Mmm. 1911. Patented Dec.3,1912.

any

y G; W. JACKSON. EXCAVATING AND LOADING MAGHINE.`

APPLICATION FILED MAR. 27. 1911.

Patented Dec. 3, 1912.

G. W. JACKSON. l EXUAVATING AND LOADING MACHINE.

APPLICATION IEI'LIE!) MAB.. 27, 1911.

Patented Dec.3,1912.

7 SHEETS-SHEET 7.

I VENTOR dit@ PHOTO-LITHD by SACKETI'B WILHELMS CORP. N-Y

" plication tor United 'States Letters Patent,

iinrfran sfr-aras raruiar 'PCIQATIN .0E ILLINOIS, f l

s, iissIGNoIt, BY iviEsnE A SSIGIMENTsY'IC COMPANY, or CHICAGO, ILLINoIs, j onn- I-iam:iiviirr"NG ANnIioAnINGMACHINE.

This invention'relates to improvements in .excavating and loading machines lot' the boomv type in which a rising and :falling boom, W'hichcarriesV .an endless series ot buckets, ,'smounted. on a turn' tablev that is pivotally supported on a truck.'wherebyth'e bbom may zbe adjusted'throiigh a wide ver'- tical and, horizontal range =of action.

The machine herein illustrated is in some respects like that illustrated in myprior ap-I SeriallNumberAQQQT, tiled .Junblsh 1909.

Such machines are. particularly adaptable for use in excavating tunnels in rock to pickup-theloose rock after` the blastsfand to load construction of the inachine `and torender the same 'exceedingly rigid..

provide means' orxlocking the boom from swinging laterally when vdisconnected from the same into cars, but maybe employed to handle other loose materials.

.Among the lobjects of the invention isV toy provide a novelmeans of pivoting the boomto theturn'- table arranged to simplify the -Av further object Tof the invention is to l the-motor which operates it, and also for locking the traction mechanism when dis-- connected from. the motor'fgto prevent the. motor driven trucktrom being. rol:1ed b ack y --fwardly .in case the buckets at the forward endet the boomshoul'dmeet. with an unsy usual resistance.

A further object, of the invention is to.soA arrange the locking. vdevices that the lock-, l ing devices `fortlieboom swinging and trac-v tion mechanisms will `be automatically .set l i upon1thediscoiiiiectionof the..niotor from the said Imechanisms.

:The invention has. for its object other viin-" -proveinents designed to simplify. and Ato reny derrthe machine; more efficient, and the, in-

' vention consists .in tliematters hereinafter Specification of Letters Patent. l PatentevdvDec. 3, 1912. Application ledMarch 2721911. Serial No. 617,050. i' i Iset forth and more particularlypointed out in the appendedv claims."`

-As shown in the drawingafFigure l is a side elevation .of the .machine embodying my invention'. Fig. 2 is a top plan view thereof. Fig. :3 is a 'horizontal section on the line 3-3 of Fig. Il. Fig. Llis a trans@ versesec'tioii' on theline L -tot Figf; Fig. 5 'is' avertilcal section on the line 5-5 of Fig. I'1.- Fig. 6 isa cross section on the line -v-fof Figi. Fig. 7 is a detail sid e el e vati'on of the boom, showing mounted there? -on motor for operating'the bucket chains.

Figi 8 is a vertical sectionv o nv the line 8-8 of Fig'. 4. Fig.v 9 is a detail section onthe line 9--9 vof vFig. 3. Fig. 10'is a horizontal 'section on the line lO-l() ot Fig-1:4. Fig.

1l is a detail-section on 4the linef 117-11 of Fig. Fig. 112 is 'a detail vertical section on the line 12-.l2 of Fig. ll.

The truck 2O l.is provided with i rear vtraction Wheels 21, 2l and front .steering wheels '22, 22,' thei stub axles of the latter ofwhich lvare, pivoted to the brackets 23 ot the truck (Fig. .Bl and linay be connected by :tan'iiliar form-of steering apparatus, such, for

instance, like that shown in my .aforesaid l prior application.

Supported on the truck to turn or rotate thereon is a turn table 28, thesame being. c entr'allypivoted to the truck, as by a bear ing'- sleeve 29 (Figs. 4' and 11')r 'rotatively mounted en .an upstanding hollow stud 30 shown [as made integral with the 'topplate -31 of' the'. truck 20. The turn table is supported on the truck through the medium of trunnion rollersSB which rest and roll on an annular raised track 34 formed on the upper face of the truck, concentric with the turn table pivot.v 'I i designates a boom that is'pivotally mounted bet-Ween its eii'dsoii the turntable ini rear ofpthe central pivot otmthe` latter. Said boom pivotally connected ata point y.b e'tivleen its ends tothe turntable through4 lthe medium of laterallyseparated legs'i,

..36, made up of. angedor ribbed metal plates `that 'are riveted or otherwise tixedly attaehed at their upper endstofthesidesof. the boom, and are Qroided v'atf their lowery -eiids with bearing eyes BS whieh'engage over which are attached to aiidiise'fron the ti'iiii i boom supporting' legs are lstilfened or strengthened between their ends by the built up transverse `stifl'ening members 41, 41 attached to the legs in the manner shown`v in Figs, 4 and 5.`v The boom 35 comprises laterally separated vertical plates 42, 42 con,

nected by the transverse I-beamstruts 43,

Figs. 4, 5 and 6. Said plates are provided at their upper edges with the flanged bars 44, 44 that stiifen the plates and support the upper'lapof the chains 45,' 45 .that carry the buckets 46, 46. Said side members of the boom are each provided at the lower .edge

thereof with upper and lower parallell' flanged bars 48, 48, the lower oneof which constitutes a track to support zthe lower lap of the bucket chains or belts andthe pairs o-f bars constituting guides for said lower laps ofthe bucketchains. The said biicket chains or belts have incorporated therein' rollers 50, 50 which rest and roll on the tracksconstituted by said anglebars 44 and 48, and said chains may be connected to the buckets bythe studs -51,51 `upon which certairr of the rollers 50 are mounted. The bucket chains are trained at the forward and rear ends of the boom oversprocket pulleys side of the boom.

53 and 54, respectively, which are ls uitably supported on shafts mounted in the side members or plates of the boom. -The vsprocket chains and buckets are given movement through the medium of a motor 5 5 that is mounted on a bracket 56 attached to one The motor consists, as herein shown, of an air motor the shaft 57 of whichv is connected by the train of gears.

shown in Figs. 1 and 2 to the shaft58 of the rear sprocket. or belt wheel.-

The lower laps .of the bucket chains are guided between the flanged bars 48 and said -flanges extend entirely to the frontend of theboom, as shown best in Fig. 1, whereby the lower Achains are supported entirely to Y the front end of the boom so as to brace the lower series of buckets and to positively hold them up against the work. The `upper flanged bars 44 support the principal parts of the upper laps of the bucket chains. rl`he forward ends4 o r mouths- 60 of the buckets 46`are flared or widened, as best shown in Figs. 2 'and 8, the widened portions of the buckets extending laterally beyond thev chains and being as wide as the over-all.

j wa'rd end of-the turn table which are mounted in bearings'64, 64 that are'inade integral with sleeves 65, 65 that are mounted on hori- Zontal, )transversely arranged shafts 66, 66 which are rotatively mounted inbearings on the front end of the turn. table'28,` asbest vshown in Figs. 3 and 8. The said screwthreaded 4shafts 63, 63 extend tlirough'and have screw-threaded engagement with sleeves or nuts 68, 68 lwhich are provided with trunnions 69, 69 that extend through the side members of theboom and are rotatively engaged with bearing bosses 70, 70 thereon, whereby the saidA screw-threaded .shafts have -swiveling connection' with the boom. The sleeves or nuts 'are held in place bythe pins '71 which extend through the trunnions thereof inside the bearing bosses 70. The said raising and lowering shafts 63 are provided at their lower .ends'with beveled gears 72, 72 which mesh with other beveled gears '73, 73` on the shafts 66 whereby, uponro-tationof. the latter shafts, the said screws 63 are turned in the nuts or sleeves 68 to raiseor lower the boom. The shafts 66, 66 are rotated through the medium of a4 horizontal operating shaft-75 which extends forey and.j aft of the turn table and is provided with a beveled gear76 that meshes with a vpair of beveled gears'77, 77 mounted on and fixed to the inner ends of` said shafts 66. The said shaft 75 is operated from a motor carried by the turn table in a manner hereinafter to be morefully described.` f The-swinging boom is braced from lateral deflection during its rising and falling movements and during-the operation of the ma- 100 chine, by means of the brace frames consist-- ,ing of the forwardly and obliquely extending members 78, 78 xed at their lower ends tothe turn table at the sides of the boom, and the upright members 79, and the. laterally oblique members 80. fixed to the forward side or edge of the turn table' (Figs. 1, 3 and 4) and rigidly connected atj their upper ends to each other and the brace member 78 at points above the boom. The 110 inner members 7 9 of the vguide frames thus constructed-.are arranged closely adjacent to the sides of the boom or to cheek blocks 83, 83 on the side members of the boom, as

shown in Figs. 1', 2 'and 8,'so as to therebyv 115' prevent the boom from swerving under lateral pressure 'or stress. The brace and guide frames also avoid twisting action on the boom pivot studs and bearings due to such lateral pressure or stress.

I now desire to call attentio-n to the fact that the boom inclines upwardly and rearwardly over the\turn table'toaf'fordv suiiicient room belowthe rear end of the b'oom for a discharging spout hereinafter to.. be 25 referred to, and acar to receive the matter dumped from the spout. In tunnels, howf ever, the voverhead room is invariably limited, andl for this reason the distance bevtween the vforward end of the turn table and the lower margins of the boom has been reduced 1n the present construction, to a i'niniinum; and to bring the'forward end of 'on the truck, 'andvlis the boom as close as possible to the forward end of the turn table, I forni inthe Side- '.plates of the`booni, a. downwardly-turned bend or'liink, as shown'in Fig. 1, which results-'in the' saving of considerable space which the machine would occupy werethe boom extended in `a straight line with t-lie middle and rear portions of saidboom.

efer'ring now to the mechanism for ad.-

Vvancing the truck under the power of its. motor, and for raising and lowering theboom7 and-to the manne-r ofmo-unting the,

turn table 28 on the truck 20, and the mechanisni for swinging the turn table on the truck to swing the boomhorizontally, said parts are made as follows -Rotatively inountedin the hollow-trunnion 30 on lwhich the downwardly extending sleeve or boss 29 .of the. 'platform is rotatively mounted is a 'vertical shaft '85 that is' provided at its lower end with a beveled pinion S6 (Fig. 4) which meshes with a beveled pinion 87 that is fixed to the forward end of a' horizontal shaft 88 which is mountedtfin bearings 89, S9 providedat its rear en d with a fixed bevel pinion 90 which meshes with a beveled g, wheel 91 onthe shaft 92 ofthe rear'traetion wheels 21. To Ithe upper end of shafct'85 is fixed a horizontal beveled gear wheel^^93 which meshes with a beveled pinion S14-formed on a sleeve 95 that loosely surrounds the shaft before -re-l ferred -to and wlxiich itself is rotatively mounted/in a bearing`97that rises from the turn table. -iLoosely` mount-d onthe front end of saidoperating Vsl'i'a'ft 75 is a sleeve" 9S which carries :thebeveled gear wheel 7G of the boom raising andlowe-ring mechanism, and which isrotatively mounted in a bearing 9 9 which rises from the forward end of the tui-n table. The operating shaft is also mountedin rear of the vertical traction drive shaft in bearings 100 and 101 which rise from the vturn table. To the rear `end of the shaft 75 is fixed a worm` wheel 102 that meshes with a ,worm carried by the shaft 103 of a motor 104-that is mounted on the' rear endv of the turn table at the right hand side thereof. Said motor may' bel of any preferable type,but when'used in tunnel work where compressed air is employed to operate thc drills` the motor will ,desirably be an air motor. The worin wheel and gear are covered by a suitable casing 105 in which is formed'the rear bearing 101 of the ,op-

@ratingA shaft 75. `Mounted in a vertical bearing 110 near the rear end of the turn table a vertical shaft 111, (Fig. 4) to the upperrnd of which is fixed a'horizontal lie-:elcd gear wheel 112 thatmesheswith a pinion 113 which is looselymounted onthe oj'ierating shaft. 75. lFixed to the lower end turn ltable l'of said shaft 111 is a pinion 115 which meshes with an internally toothed circular rack v116 that'is fixed to andA rises from the truck, Said rack Vbeing concentric with the pivot. The beveled pinion 113 is Yadapted tobe locked to the shaft, 75 by a clutch sleeve 120 splined to and slidable endwise of the shaft 75 and provided with clutch teeth or jaws to engage in like teeth or jaws ori-the adjacent end of the pinion 113. Both of the sleeves 95 and 98 which,

respectively, carry the pinions 94 and 7G,

are shown as adapted 'to be separately clutched to the main operating shaft-75 by means of a single clutch collar 122 splined to and slidable on the shaftf75, and provided at its opposite ends-- with clutch teeth or\ jaws to engage the similarly formed clutch teeth or jaws on the adjacent ends vof said lsleeves 95v and 98, as best shown in Figs.

3 and 4.

- Referring now to the manner in which the several mechanisms are controlled to move -th'e truck on its wheels7 totiirn the turn table side of the turn table. Fixed 'tothe outer fend of the rock shaftj132 is ali-and lever 135. -By rocking said vvshaft 132 in one direction the clutch collar 122 is shifted on the teeth or Vjaws of the beveled gear wheel 76 .thereby locking said gear wheel to the shaftv 7 5:and rotating, vthrough the medium of the shafts 66, 66, the screw-threaded 'boom raisingand lowering shafts-.G3 to raisebrlowcr said boom. The direction in which the boom will-be thus swung onits pivot will depend upon the'direction of rotation of the motor 1.04: The valve controllinglever 137 of said motor 104'isconnected by a link-*13S to the cran-k arm 139 of a `short rock shaft 140'that' Pivotallyf-connected atv fone shaft 75 t0 bring one A.setfof its clutch teeth' v1 ,or jaws into engagement 'with the clutch has thereon a double'4 ended foot piece or f 'treadle 141, whereby fthe saidvvalve lever may be swung 'in veither direction to drive the motor forwardly or rearwardlyn The swingingend' 127 lof the lever 125. is connectedby a link 143 with a `sleeve 14.5 that is slidable on the main'op'erating shaft 75 just in -rear of the beveled "pinionI 94 t hat' com? inunicates 'traction' power to the traction wheels 21. The 'sai-d sleeve 145 is-piovided with relatively long, angularly spacedvteeth or javvs y146 that are adapted t0 engage like spaced teeth or jaws 147'on the 'adjacent end of the sleeve 95 which carries'said pinion 94. The locking sleeve`145is held nonrotative ori theshaft'T 5 bymeansfof a *latL erally extending arm. 150, -(Figs. 3 and 11) the.. outer end of wliich'engages beneath a` guide plate 151A that is 'bolted or otherwise fixed to the upper face of the turn table7 the said guide plate being recessed tov perwith the raising and lowering boom-shafts `63,...and said teeth orjaws act .at thislt-ime` mit movement of said arm relatively to the guide plate, ,as indicatedin dotted lines in Fig. 3. The said intermeshing teeth or jaws, 146, 147 .areof such length as to'remain-` en-I gaged when lthe clutch` collar 122 is-.in its neutral position and 4also when it is 'in its forward 'position to connect` the 'shafsv75 to 'lock thepinion 94 andthetraction gear so as ltoA prevent the truck from moving on its wheels'when power is applied to raise or 'lower the iboom. lVhen the clutch sleeve 1h22 is shifted rearwardly to lock. the sleeve 95 which carriesr the pinion 94 to the operating vshaft, and thereby connectvthe motor' 1 to the traction wheels to m'ove the truck the-'teeth 14.6 of the locking'sleeve 145 with said sleeve 9 5,` and that whenA the traction 'gear is' connected, through the clutch sleeve backwardly or forwardly, the i-nterniieshing teeth or jaws of the collar 145 and the sleeve 95 aredisengaged to permit thepinion 94 toy .turn with the operating shaft 75 and thereby operatethe traction mechanism. It

will thus be seen that when the clutch collar 122. is released from the sleeve 95.130 Yrelease the traction gear from the loperating shaft, the said traction gear is automatically locked fixed or stationary by enga-gement of 122jand sleeve 95 with'the operating vshaft, thetraction locking device is automancally By reason of the screwthreaded engagement4 ofthe `boom raising and lowering shafts 63 with the nuts 63 on said boom, the said boom is automatically locked at a given elevation when power is disconnected therefrom, thereby avoiding the necessity of providling., special locking means therefor to hold the boom at a desired elevation when power is Vdisconnected therefrom.

The clutch sleeve 120 by which the operating/ shaft y7 5 isV connectedt to'the beveled pinion 113`of the turn table operating gear is controlled by connection with a hollow rock shaft-:155 that, is rotatively ymounted on the rock shaft 132 before referred to, said Jarts'ljeing made as follows -157 designates a horizontally swinging lever thatis pivoted at,I one end at 158 to the turn table t and is forked at its'other'end to afford loose connection with a ring 159 that Yis loosely mounted about the vclutch sleeve 120. The said lever 157 is connected by a link 162 to a crank arm 163 on the inner end of the `hollow rockshaft 155, and said .rock shaft is provided at its outer end with a hand lever 164`by which to operate the same.

VVhn thehand lever is swung forwardly the clutch sleeve 120 is engaged with the beveled pinion 113 to lock the latterto the' lshaft and to connect the motor to the turnl table operating mechanism a manner to rotate the turn table and to swing the boom' horizontally. The said cont-rolling means for the turn table operating mechanism is provided with locking-means byA which to lock the turn table from rotation simultaneously with the disconnection of the .motor from-.the turn table operating mechanism. The construction, herein shown for effecting this result is made as follows 165', Figs. 11 i 12,.designates a short verticalsshaft vthatisrotatively mounted in a ,bearinfr 166@ atone side of the turn table and is vprovided at its lower e'ndA with a pinion' 167 which meshes with ythe internally 'toothed rack 116.. The shaft 165 has fixed to its upper end a horizontal disk 170 that conjtained within -a recess at the upper side of the turn table, and vsaid disk is 'formed at'.

its upper side with a plurality Of, angularly spaced lugs 171, 171,` asl shown also iii-Fig. 1 3, forming between them vangular-ly spaced' notches. The disk 170 ils located 4belowthe Vrock shaft155 and said rock shaft is provided with av fixed locking'dog, 173 which extends laterally and downwardly therefrom inpositionto enter the notches between said lugs 171. When the rock shaft 155 is rocked forwardly to throw the clutch 1 sleeve 120 into engagement .with the beveled pinion 11S-to connect the motor tothe'turn tableope'rating mechanism,- said locking dog is thrown rupwardly above the plane of the lugs 171 so that the shaft 165 is free to rotate in its bearing, and will rotate freely when the-turn table and'its rock shaft turns -or rotates. When the parts are reversed to Adisconnect the motor from the turn table operating mechanism, the said dog 1734 is swung downwardly into one of the notches between the lugs 171 and thereby locks the shaft 165 and its pinion 167 from rotation and, by reason of the meshing of the pinion thus fixed with the rack on the turn table,

swivel-connectionl182. whereby said 'chuteY may be turned in any direction desired to carry the material delivered into the hopper to cars 185 located in rearor at the side of therear `end of the machinaasV indicated in Figs. 1 and 2.

In order to prevent loose material carried upwardly along -the boom by the buckets from falling out of the buckets and through the boom, l may provide at the top of the boom a plate 186 which extends longitudinally from the front'to the rear end of the boom beneath the level of the buckets on the upper lap of the chain,`as shown in Figs. 1,v

operations of the machine to be controlled from one side ofthe machine by the use'of theV ypedal 141 two handy levers .135,and`173, l and eachmechanism is automatically locked` from movement when the Vpower is disconnected therefrom, so that the front or receiving end of the boom may be reliably held at all times inthe work. The provision of the -boom carryingy legs 36, attached between the, ends of the boom, for pivoting the boom to the turntable constitutes an. eX- ceedingly, effective and inexpensive method of connecting the boom `to theturn table,

Y .and this construction also enables a portion of the weight of the forward end of the boom to be 'counterbalanced so as to thereby require less power to raise and lower the boom and requires a lighter constructed raising" and lowering mechanism than if the boom be pivoted at its extreme rear end.

It will be obvious that the structural de-` tails of the invention describedl may be varied within the spirit and scope of the invenprior art.` i

tion, and the `invention is not limited to the illustrated details except as' imposed by the I claim as my invention *A 1. Anjexcavating and loading machine Icomprising a wheeled truck, a turn table` pivoted centrally thereof to theV truck and provided withl means for turning fit on its pivot, a vertically swinging boom over the turn table provided between its ends with members which are fixed to the sides of the boom and extend Adownwardly therefrom,

means for pivoting theV lower .ends of said members directly to the turn table, an 'lendless series of travelingbuckets mounted on g vpivoted centrally thereof to the truck and provided with means for turning it on its pivot, a vertically swinging boom over the turn table provided between its ends with members' which are fixed to the sides of1 the The construction described permits all the boom and extending downwardly therefrom, means lfor pivoting the lower ends of said members directly to the turntable, an

endless seriesof' traveling buckets mounted' on the 'boom with means to move them alongA the boom, and guiding and bracing frames at the sides of the boom each comprising a forwardly andupwardly extendingl mem ber which is attached at its'lowei' end to the upper side of the turn table, land vaninner vertical andan outer la'terally oblique member attached to the .-front of the turn table, the members of each frame being rigidly lfixed togetherV at their upper ends.

3; An excavating and loading machine comprisingl a wheeled truck with' traction means for moving theisam'e on its wheels, a

horizontally and vertically swinging Yboom supported on the truck, with means for swinging it horizontally and vertically', an endless series of traveling buckets supported on the' boom,'with 'means for giving said buckets movement along the boom, a motor, a clutch device for connecting the lnotor with the truck traction means, andlocking means operativelyl connected to and movable with said clutch device. and operable upon ythe releasing movement, of the clutch device from the traction means to* lock the traction means inoperative.` I

4. An excavating 'and loadingv machine comprising a truck having traction and steering wheels, a horizontally and'vertically swinging boom supported on the truck, with means Vfor swinging it horizontally and vertically, ya motor,a horizontally arranged operating shaft, mechanism for connecting the motor tothe operatingshafa-a vertical shaft geared to the traction wheels of the truck and provided at its upper end with a gear wheel, a sleeveloosely mounted on said Aoperating shaft and having a pinion which meshes with said lgear wheel, a clutch collar splined to `the operating shaft for connecting the operating shaft with said pinion sleeve, a locking ring slidable and non-rotative on the operating shaft and having means-to interlock it with -said pinion sleeve .andfa .connection between said locking ring and 'the' clutch collar.

5,. An excavating and loading machine comprising a truck having traction and steering wheels, a horizontally and verti-v cally swinging boom supported on the truck, a motor, a horizontally arranged operating shaft, mechanismfor connecting the motor with" the operating shaft, traction means adapted vto be'conneeted to the operating shaft, raising andlowering means for the boom. Vadapted for connection with the operating shaft, and a single clutch device adapted to alternately connect said operating shaft with the traction means and with said boom raising and lowering means.

6. An excavating and loading machine ymotor, a horizontallyl arranged operating' shaft, mechanism for connecting the motor with' the, operating shaft, traction means vadapted to vbe Vconnected to theoperating shaft, raising and lowering means for the boom adapted for connection with the oper atingv shaft, a single cliitcli'device adapted to alternately'connect said operating shaft with the, traction means and with boom raising and lowering means, a locking device for `the traction means and operative connections between the locking device and said clutch device arranged to lock the traction means simultaneously with the disconiiection/ of the operating shaft from the traction means. y l

7. An excavating and loading machine comprising a truckv having traction and steering wheels, a horizontally and vertically swinging boom supported on the truck, a moto-r, a horizontally arranged operating shaft, mechanism for connecting the'inotor Vwith the' operating shaft, traction vmeans adapted to be connected to the operating shaft,` raising and lowering means for the boom adapted for connection with the operating shaft and having means t'o automatically lock the boom in adjusted vertical positions, a single clutch' device adapted to alternately connect said operating shaft with the traction means and with said boom raising and lowering means, a locking device for the traction means and operative connections between the loclting'device and saidclutch device arranged to. lock the traction means simultaneously with the disconnection of the operating shaft fromy the traction means.

S. An excavating and loading machine comprising a wheeled truck, a turn tabl-e pivcted to the truck, a vertically swinging boom pivoted to the turn table, with means for' raising andlowering the saine, a motor, a horizontal operating shaft connected by suitable mechanism to the motor, a curved rack on the truck, a vertical drive shaft for. the turn table mounted on the turn table and having a pinion meshing with said rack,

'means for connecting the operating shaft to and disconnecting it from the turn table.

drive shaft,lembracing'a clutch device and means vconnected to said clutch device for locking the turn table from Arotation when meansffor connecting the operating shaft to 'and disconnecting it.- from the turn table drive shaft embracing a clutch device, a vertical lock shaft mounted in the turn table and having a pinion which meshes with said 1ack, and operative connectionsbetween said clutch device and said lock shaft' having means to lock the latter from rotation when the clutclfdevice is shifted to release the turn table drive shaft from the operating shaft.'

l0. An excavating and loading machine comprising a wheeled truck, a turn table pivoted to the truck, a vertically swingingl boom pivoted to the turn table, with means for raising and lowering the same, a motor,

horizontal operating shaft connected by suitable mechanism tothe motor, a curved rack on the truck, a vertical drive shaft mounted in the turn table and having a piiiion meshing with the rack, means for c0n .iiecting the operating shaft withthe turn table drive shaft, embracing a clutch device, a vertical lock shaft mounted in the turn table and having a lpinion which meshes with said rack, and provided with a series of spaced notches, and a rock shaft operatively coiinected with said clutch device to operate the latter and provided with a locking dog to engage the spaced notches of the lock shaft.

Intest-imony, that I claim the foregoing as' my invention I afliX my signature inthe presence of two witnesses, this 22d day of March A. D. 1911. v

GEORGE W. JACKSON. V-Vitnesses: Riel-IARD V. llIEoARY,` WILLIAM O. STARK.

ico 

